Consolidated Statement of Operations - USD ($) shares in Thousands, $ in Thousands	1 Months Ended	3 Months Ended																12 Months Ended
	Feb. 11, 2016	Dec. 31, 2015		Sep. 30, 2015		Jun. 30, 2015		Mar. 31, 2015		Dec. 31, 2014		Sep. 30, 2014		Jun. 30, 2014		Mar. 31, 2014		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Statement [Abstract]
Revenue		$ 769,383		$ 714,526		$ 754,354		$ 748,117		$ 783,444		$ 718,314		$ 746,760		$ 745,493		$ 2,986,380	$ 2,994,011	$ 2,550,466
Costs and expenses		(581,942)		(573,723)		(588,096)		(570,674)		(578,142)		(570,030)		(590,719)		(579,435)		(2,314,435)	(2,318,326)	(2,001,419)
Gross profit		187,441		140,803		166,258		177,443		205,302		148,284		156,041		166,058		671,945	675,685	549,047
General and administrative expenses																		(128,188)	(184,749)	(155,128)
Gains (losses) on divestitures and impairment charges, net																		6,522	116,613	(6,263)
Operating income		157,035		124,548		127,581		141,115		220,281		135,119		144,730		107,419		550,279	607,549	387,656
Interest expense																		(172,897)	(177,571)	(142,360)
(Losses) gains on early extinguishment of debt, net																		(6,918)	(29,158)	468
Other (expense) income, net																		(113)	1,780	(558)
Income from continuing operations before income taxes		113,699	[1]	74,045	[1]	84,489	[1]	98,118	[1]	177,591	[1]	91,735	[1]	69,316	[1]	63,958	[1]	370,351	402,600	245,206
Provision for income taxes		41,249		26,118		31,007		36,653		90,982		74,934		37,357		22,707		(135,027)	(225,980)	(93,024)
Income from continuing operations		72,450		47,927		53,482		61,465		86,609		16,801		31,959		41,251		235,324	176,620	152,182
Net (loss) income from discontinued operations, net of tax		0		0		(390)		0		1,340		884		(178)		140		(390)	2,186	406
Net income		72,450		47,927		53,092		61,465		87,949		17,685		31,781		41,391		234,934	178,806	152,588
Net income attributable to noncontrolling interests		(96)		(479)		(497)		(90)		(155)		(34)		(5,859)		(289)		(1,162)	(6,337)	(5,256)
Net income attributable to common stockholders		$ 72,354		$ 47,448		$ 52,595		$ 61,375		$ 87,794		$ 17,651		$ 25,922		$ 41,102		$ 233,772	$ 172,469	$ 147,332
Basic earnings per share:
Net income attributable to common stockholders, basic		$ 0.37	[2]	$ 0.24	[2]	$ 0.26	[2]	$ 0.30	[2]	$ 0.42	[2]	$ 0.08	[2]	$ 0.12	[2]	$ 0.19	[2]	$ 1.17	$ 0.82	$ 0.70
Basic weighted average number of shares																		200,356	210,741	211,811
Diluted earnings per share:
Net income attributable to common stockholders, diluted		0.36	[2]	$ 0.23	[2]	$ 0.25	[2]	$ 0.30	[2]	$ 0.42	[2]	$ 0.08	[2]	$ 0.12	[2]	$ 0.19	[2]	$ 1.14	$ 0.81	$ 0.68
Diluted weighted average number of shares																		204,450	214,200	216,014
Dividends declared per share	$ 0.12	$ 0.12																$ 0.44	$ 0.34	$ 0.27

[1] Includes (Losses) gains on divestitures and impairment charges, net, as described in Note 19.

[2] Net income per share is computed independently for each of the quarters presented. Therefore, the sum of the quarters’ net income per share may not equal the total computed for the year.